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Ethereum Transaction History

The Ethereum-blockchain Size Will Not Exceed 1tb Anytime Soon.

The Ethereum-blockchain Size Will Not Exceed 1tb Anytime Soon.

The Ethereum-blockchain size will not exceed 1TB anytime soon. Before diving into this article, please read the two disclosures about my involvement (1,2) and the one on data accuracy (3) at the bottom of the article. At least once a month someone posts a chart on r/ethereum predicting the blockchain size of Ethereum will soon exceed 1 TB. I want to take that chance to clean up with some stories around the Ethereum-blockchain size in this article and try to explain why this chart is technically correct, but not the full picture. Let's have a look at this chart first. It shows the complete data directory size of an Ethereum node (red), Geth in this case, and a Bitcoin node (blue), probably Bitcoin-Core , plotted over time. While the Bitcoin graph is moving slightly upwards in a seemingly linear inclination, the Ethereum graph reminds the reader of an exponential growing slope. On Blocks, Block-History, States, and State-History Users accusing Ethereum of blockchain-bloat are not far off with their assumptions. But actually, not the chain is bloated but the Ethereum state. I want to examine some terminology from the Whitepaper before proceeding. Block. A bundle of transactions which, after proper execution, update the state. Each transaction-bundling block gets a number, has some difficulty, and contains the most recent state. State. The state is made up of all initialized Ethereum accounts. At the time of writing, there are around 12 million known accounts and contracts growing at a rate of roughly 100k new accounts per day . Block-History. A chain of all historical blocks, starting at the genesis block up to the latest best block, also known as the blockchain. State-History. The state of each historical block makes up the state history. I will get into the details on t Continue reading >>

Solidity - Getting Transaction History For A Particular Account - Ethereum Stack Exchange

Solidity - Getting Transaction History For A Particular Account - Ethereum Stack Exchange

Getting transaction history for a particular account I want to get the list of all the transactions which have been performed by/on an account in my private blockchain. I tried using the function getTransactionsByAccount(accountAddress, startBlockNumber, endBlockNumber) given on this link .The problem with this method is that for transactions which include transfer (of amount) from one account to another, it gives the correct address in "from" field, but incorrect one for "to" field. So, I'd like to ask if there is some other method by which we can get the transaction history??? contractAddress = "0x00.."web3.eth.filter({address: contractAddressfrom: 1,to: 'latest'}).get(function (err, result) {// callback code here}) This works for contract's address it will not work for external owned accounts. Ismael Aug 29 at 15:54 I don't know what difference it makes, but on storing contract address in a variable and then passing it into the filter doesn't work, whereas passing the contract address directly into the filter yields the correct result. Also, 'from' and 'to' should be replaced by 'fromBlock' and 'toBlock'. Anchit Seth Aug 31 at 11:30 Yeah, the above mentioned approach works for Contract Addresses. Unfortunately, there is not any method in Web3js which will help us achieve this task. But, the way I did it was going from the 0 block-number to Latest. While going through I got all the transactions that happened in the block along with the details of the transaction. I have used web3.eth.getBlock , to get all transactions from the block. function getAccountTransactions(accAddress, startBlockNumber, endBlockNumber) { // You can do a NULL check for the start/end blockNumber console.log("Searching for transactions to/from account \"" + accAddress + "\" within blocks " + sta Continue reading >>

Verifying An Ethereum Transaction

Verifying An Ethereum Transaction

Your ethereum transaction history can be accessed by clickingEtherin the menu on the left. All ethereum transactions you have sent and received will be displayed, and additional information about individual transactions can be accessed from this section of your wallet. Start by clicking on a transaction. You can see that the transaction is either confirmed or pending on the bottom left. If you move your cursor over the box with the arrow to the left ofTransaction Confirmedyou will see the following: Clicking on this box will take you to the actual transaction on the ethereum blockchain. Our wallet will redirect you to a third party site called Etherscan.io, but you can use any ethereum block explorer to verify this information. Continue reading >>

Ethereum Sets New Transaction Record, Outperforming Bitcoin

Ethereum Sets New Transaction Record, Outperforming Bitcoin

Ethereum sets new transaction record, outperforming Bitcoin Above: Ethereum is a type of cryptocurrency. Bitcoin is getting most of the attention these days with prices repeatedly hitting new all time highs (although today saw a slight correction). However, Bitcoin is getting beaten in one area. For the first time ever, Ethereum yesterday had more than 400,000 transactions , a record for any public blockchain, and around 40,000 higher than Bitcoins record day. The high transaction volumes havent caused much movement in Ether prices though, which have been pretty stable at around $300 over the last week (yes, there have been swings of +- $20, but thats within the usual volatility in crypto). In the past, Ether prices haveusually been very tightly coupled to Bitcoins, almost immediately following its ups and downs. This time seems to be an exception, though, and there are a few possible reasons for this. First, a lot of people want to be part of the Bitcoin rally weve seen over the last few days and are moving their Ether to exchanges to sell for Bitcoin. Second, the constant influx of new Ethereum-based ICOs is affecting the price, with people sending their ETH to these projects. Finally, on top of this, you have the usual market manipulation, known as whale games , with the big players keeping the prices down. Even though prices arent increasing much yet, the transaction numbers means the network is being used. And if its being used more than the other frameworks, then maybe the Ethereum framework has some intrinsic value, which at some point will ultimately be reflected in the price. There definitely isnt any lack of speculation in price increases in the community. Ethereums next major update, named Metropolis, is probably only a couple of months away. In the 35 days Continue reading >>

A Hacker Stole $31m Of Etherhow It Happened, And What It Means Forethereum

A Hacker Stole $31m Of Etherhow It Happened, And What It Means Forethereum

A hacker stole $31M of Ether how it happened, and what it means forEthereum Yesterday, a hacker pulled off the second biggest heist in the history of digital currencies. Around 12:00 PST, an unknown attacker exploited a critical flaw in the Parity multi-signature wallet on the Ethereum network, draining three massive wallets of over $31,000,000 worth of Ether in a matter of minutes. Given a couple more hours, the hacker couldve made off with over $180,000,000 from vulnerable wallets. Having sounded the alarm bells, a group of benevolent white-hat hackers from the Ethereum community rapidly organized. They analyzed the attack and realized that there was no way to reverse the thefts, yet many more wallets were vulnerable. Time was of the essence, so they saw only one available option: hack the remaining wallets before the attacker did. By exploiting the same vulnerability, the white-hats hacked all of the remaining at-risk wallets and drained their accounts, effectively preventing the attacker from reaching any of the remaining $150,000,000. To prevent the hacker from robbing any more banks, the white-hats wrote software to rob all of the remaining banks in the world. Once the money was safely stolen, they began the process of returning the funds to their respective account holders. The people who had their money saved by this heroic feat are now in the process of retrieving their funds. Its an extraordinary story, and it has significant implications for the world of cryptocurrencies. Its important to understand that this exploit was not a vulnerability in Ethereum or in Parity itself. Rather, it was a vulnerability in the default smart contract code that the Parity client gives the user for deploying multi-signature wallets. This is all pretty complicated, so to make th Continue reading >>

Checking Or Replacing A Tx After It's Been Sent

Checking Or Replacing A Tx After It's Been Sent

Our Check TX Status Page via TX hash: Can I cancel, override, overwrite, replace, or do anything once a transaction has been sent? 99.9999999999999999% of the time the answer is NO. Once a transaction has been mined and is included in a block on the blockchain, it cannot be canceled or replaced. During times of normal volume, transactions are mined within seconds and do not spend any length of time in the transaction pool. There is simply not enough time to cancel or replace or override a transaction once it has been sent. During times of extremely high volume (like we've seen during the Bancor and Status Token Contribution periods), transactions could be pending for hours, if not days, before being mined. During these times it is theoretically possible to replace an existing transaction with a new transaction with a higher gas price. The second transaction, theoretically, will be mined before the first transaction, effectively "canceling" the first transaction. The easiest way to do this is by sending a 0 ETH transaction to your own address with the same nonce and higher gas price. This will "cancel" your first transaction. There is no guarantee this will work, nor that it will work every time. This tool is very, very new. Please use at your own risk. Do not take this article or features on MyEtherWallet as an indication that you can cancel a transaction you accidentally sent to the wrong address, or get your ETH back once it has been sent. It is only regarding finding, checking, and potentially replacing transactions that have been stuck in the transaction pool for very long period of time. Copy & paste the transaction hash into the field provided. Details will appear depending on the state of the transaction. It could be... Transaction Found: Your transaction was su Continue reading >>

Ico Investment Do Not Burn Ether In Gas

Ico Investment Do Not Burn Ether In Gas

ICO Investment Do not burn Ether in Gas ICO Investment Do not burn Ether in Gas An investor lost a significant amount of Ether during the failed attempt to purchase AirSwap tokens during its ICO, a decentralized cryptocurrency exchange that started their public crowdsale on Tuesday. The Investor was trying to buy $508,000 (1,700 Ether) worth of AirSwap tokens, but the trade failed and the investor lost $70,000 (236.9516 Ether) in form of Ethereum transaction fees. AirSwap is a decentralized token exchange based on the Swap protocol whitepaper. Swap provides a decentralized trading solution based on a peer-to-peer design. The design solves two problems encountered in a peer-to-peer trading environment: counter-party discovery and pricing suggestions. The token sale happened between 10 October 2017 10:10:10 AM Eastern Time and 11 October 2017 at 9:10:10 AM Eastern Time. The token sale was whitelisted and shortlisted investors were entitled to allocation of the individual cap (3.3 ETH) during the entire 23 hours of the main sale. The whitelist registration process happened between October 4, 2017 at 10:00AM Eastern Time and October 6, 2017 at 4:00PM Eastern Time. During the whitelist registration there were more than 18,000 submissions of which 12,719 were successfully whitelisted for the sale. AirSwap was running the sale through their own platform to avoid Ethereum network congestion, high gas fees, and to put their protocol and smart contracts to work. It is a web application that connects to the Ethereum network. MetaMask and Parity browser extensions were required for the AirSwap sale. The investor, only known at this point by their Ethereum blockchain address 0xf51ec864d5fb2f184198e369fe063fc77045a3ad, was trying to buy about $508,000 worth of AirSwap tokens or 1,70 Continue reading >>

Accessing Contracts And Transactions

Accessing Contracts And Transactions

In previous sections we have seen how contracts can be written, deployed and interacted with. Now its time to dive in the details of communicatingwith the Ethereum network and smart contracts. An Ethereum node offers a RPC interface. This interface gives apps access to the Ethereumblockchain and functionality that the node provides, such as compiling smart contract code. It uses a subset of the JSON-RPC 2.0 specification (no support for notifications or named parameters) as serialisation protocol andis available over HTTP and IPC (unix domain sockets on linux/OSX and named pipes on Windows). If you are not interested in the details but are looking for an easy to use javascript library you can skip the following sections and continue with Using Web3 . The RPC interface uses a couple of conventions that are not part of the JSON-RPC 2.0 specification: Numbers are hex encoded. This decision was made because some languages have no or limited support for working with extremly large numbers. To preventthese type of errors numbers are hex encoded and it is up to the deverloper to parse these numbers and handle them appropriately. See the hex encoding section on the wiki for examples. Default block number, several RPC methods accept a block number. In some cases its not possible to give a block number or not very convenient. Forthese cases the default block number can be one of these strings [earliest, latest, pending]. See the wiki page for a list of RPC methods that use the default block parameters. We will go through the different steps to deploy the following contract using only the RPC interface. contract Multiply7 { event Print(uint); function multiply(uint input) returns (uint) { Print(input * 7); return input * 7; }} The first thing to do is make sure the HTTP RPC inter Continue reading >>

How To Do An Ethereum Transaction, & Check Your Balance? | Cryptocompare.com

How To Do An Ethereum Transaction, & Check Your Balance? | Cryptocompare.com

How to make an Ethereum Transaction, & check your balance? Once you have managed to set up an Ethereum Miner using either your GPU or your CPU its time to start checking your balance and start trading. Were going to show you how you can check your balance in Command Prompt, how to convert between all the different values of Ether , such as the base unit Wei, and how to make your first transaction! Once you have set up your miner via running the Geth program and Ethminer program (see our guide here on how to get started), you need to open up a third Command Prompt Window. Step 1: This can be done by right clicking on the command prompt in the taskbar at the bottom of your screen and then clicking on the command prompt that appears at the top of the menu. A third command prompt should now be open. Step 2: You now need to tell this Command Prompt where to look to get up and running. Usually the command Prompt window opens looking at your user profile. If this is the case you need to tell Command Prompt to go to wherever you installed geth. In our guide we installed it straight on the C Drive so we need to tell command prompt to get back to the C Drive which we do by typing in cd C:\ and pressing enter. Step 3: You then need to tell Command Prompt what to do. In this case you need to tell it to attach to Geth. So all you type in is geth attach which should look like this C:/>geth attach and then press enter. You now have a console up and running talking to geth so you can start asking it questions or telling it to do things. Remember for"geth attach" to work you need to have anotherCommand Prompt Window runningwith "geth --rpc". If you want to find out your address you type in eth.coinbase. This should look like this C:/>eth.coinbase. Press enter and you should see your ad Continue reading >>

The History Of Ethereum Cryptocurrency Ethereum

The History Of Ethereum Cryptocurrency Ethereum

The history of ethereum is definitely something any crypto enthusiast would be interested in. Even those who arent familiar with blockchain technology have heard of Bitcoin and the payment process that uses the technology. There is mention from experts that, cryptocurrency Ethereum will rocket past Bitcoin in 2018. Cryptocurrency Ethereum is a public service that uses blockchain technology to process smart contracts and trading safely without intermediary. Cryptocurrency Ethereum has two types of accounts: externally owned accounts and contract accounts. Ethereum enables developers to build different types of decentralized apps. Since Ethereum seems to be gaining steady momentum, experts are predicting it would soon surpass Bitcoin usage. Bitcoin and Ethereum are similar in many ways. There are however key differences between the two: Bitcoin trades only in crypto. Ethereum has several methods such as cryptocurrency, smart contracts and Ethereum virtual machine. Bitcoin uses proof of work security protocol. Ethereum uses proof of stake. Bitcoin only allows public transactions to be processed. Ethereum allows both permissioned and permissionless transactions. Ethereums averaged block time is a lot less than Bitcoins at 12 seconds vs 10 minutes. Because of this, there are more block confirmations which enables miners to mine more and receive more reward. By 2021 it is calculated that only half of the Ether will be mined ( more than 90 million tokens) but the majority have been mined (21 million supply cap) With Bitcoin, miners run the platform and verify transactions and are rewarded. The first computer to solve each new block gets bitcoins as a reward. Ethereum doesnt offer block rewards, but allows miners a transaction fee. One of the advantages of Ethereum is that it Continue reading >>

Ethereum - Wikipedia

Ethereum - Wikipedia

This article has multiple issues. Please help improve it or discuss these issues on the talk page . This article relies too much on references to primary sources . Please improve this by adding secondary or tertiary sources . Some of this article's listed sources may not be reliable . Please help this article by looking for better, more reliable sources. Unreliable citations may be challenged or deleted. The Ethereum Project's logo, first used in 2014 Ethereum is an open-source , public, blockchain -based distributed computing platform featuring smart contract (scripting) functionality. [2] It provides a decentralized Turing-complete virtual machine , the Ethereum Virtual Machine (EVM), which can execute scripts using an international network of public nodes. Ethereum also provides a cryptocurrency token called "ether", which can be transferred between accounts and used to compensate participant nodes for computations performed. [3] "Gas", an internal transaction pricing mechanism, is used to mitigate spam and allocate resources on the network. [2] [4] Ethereum was proposed in late 2013 by Vitalik Buterin , a cryptocurrency researcher and programmer. Development was funded by an online crowdsale between July and August 2014. [5] The system went live on 30 July 2015, with 11.9 million coins "premined" for the crowdsale. [6] This accounts for approximately 13 percent of the total circulating supply. In 2016, as a result of the collapse of The DAO project, Ethereum was forked into two separate blockchains - the new forked version became Ethereum (ETH), and the original continued as Ethereum Classic (ETC). [7] [8] [9] Ethereum was initially described in a white paper by Vitalik Buterin , [10] a programmer involved with Bitcoin Magazine , in late 2013 with a goal of buildin Continue reading >>

In What Ways Can Storage History Be Accessed?

In What Ways Can Storage History Be Accessed?

Ethereum contracts run on a blockchain and therefore have the characteristics of blockchains: all transactions (state transitions) are traceable and can be replayed by any node in the system. In fact they are replayed by any node downloading the blockchain from scratch. When the node is up to date, all current storage of the contracts can be queried from a DApp, JSON RPC etc. How can the history of the storage be queried? To give an example, if one were to build a subcurrency using the Subcurrency example , we would effectively have an altcoin running on Ethereum. Securely transacting with these "coins" is a matter of sending Ethereum transactions to the contract calling its send function. Show the transaction history of an address in terms of the subcurrency Show transaction details in terms of the subcurrency, i.e. "On 2015-01-05 11:28 an amount of 33 subcoins were transferred from address X to address Y, executed in Ethereum transaction 0x12345 in block 82324" Search for addresses that have transacted in the subcoin, even if they don't currently possess coins anymore Continue reading >>

Coinbooks Track Your Ethereum Transactions And Tokens

Coinbooks Track Your Ethereum Transactions And Tokens

Coinbooks helps you keep track of all your balances, transactions, and token holdings on the Ethereum blockchain. Only an email address is required to start using it. Add your addresses to sync all transactions and token holdings. Coinbooks uses Etherscan.io and Ethplorer.io as its sources of truth for the Ethereum blockchain. We encrypt all data and use SSL for network traffic. Your data remains as anonymous as possible. We only collect an email address, so use an anonymous one if privacy is a concern. Get a grip on your ETH income and spending with transaction categorization, whether you are using Ether for investing, DAOs, or something else no one has thought of yet! Ethereum addresses are intentionally obfuscated. Now, behind your personal Coinbooks account, you can associate 0x1d492b39d87427... with Jane Doe and search for transactions associated with her. Using Ethplorer.io, Coinbooks syncs any token holdings associated with your ETH addresses. You can easily view your Golem, Trustcoin, or any other ERC20 compliant tokens. Get a big picture view of your accounts through your personal dashboard. You'll get account balances, income vs. spending, spent and received by category, and more. Need a custom dashboard for your Ethereum smart contract? We can create one for you and link it to your Coinbooks account. Coinbooks is free to use! We appreciate your support in the form of Twitter shoutouts @coinbooksio or ETH donations. 0x9acFB1C50dA185B96D8534caB05cB017185D85dd Continue reading >>

Video Sharing Platform Viulys Viu Tokens Record Highest Transaction-volume On Ethereum Network

Video Sharing Platform Viulys Viu Tokens Record Highest Transaction-volume On Ethereum Network

Video Sharing Platform Viulys VIU Tokens Record Highest Transaction-Volume on Ethereum Network Join our community of 10 000 traders on Hacked.com for just $39 per month. This is a submitted sponsored story.CCN urges readers to conduct their own research with due diligence into the company, product or service mentioned in the content below. Just days before Viuly connects its blockchain-based video sharing platform Viuly.io to the Ethereum Mainnet on December 18th, its native VIU tokens is already number 1 ranked out of the top 50 tokens by transaction count on the Ethereum blockchain . Spurred by this unexpected turn of events, the Estonian-based online video startup is now looking forward to December 18th, when its video platform will be fully live, allowing users to directly withdraw and deposit VIU tokens between their Ethereum wallets and the Viuly platform. This means that users can instantly withdraw VIU tokens earned from watching videos, and advertisers can begin depositing VIU to purchase advertising packages. The latest development comes on the back of a massive airdrop campaign that successfully distributed around 458 million VIU tokens to some 900,000 individual Ethereum users, thus making room for almost one million potential new users with immediate utility on the Viuly platform. Already live for several weeks, the alpha platform now hosts 70,000 registered users from more than 12,000 unique visitors every day. Trading activity for VIU tokens have also seen a marked increase after being available for trading on Bit-z (with BTC) and EtherDelta (with ETH) cryptocurrency exchanges. Advertisers wishing to take advantage of early exposure can now purchase VIU on these exchanges, to be used on the Viuly platform to promote videos, pre-roll video ads and banner Continue reading >>

How To Read An Ethereum Transaction

How To Read An Ethereum Transaction

Last updated on October 30th, 2017 at 08:01 am Although 99Bitcoins has been around for a while, it just occurred to me that weve never really covered the basics of Ethereum transactions even though weve discussed Ethereum itself. So this post is aimed at all of the Ethereum newbies out there: lets understand how to read an Ethereum transaction. The first thing youre going to need in orderto read a transaction is an Ethereum block explorer. A block explorer is a search engine that allows you to search inside the Ethereum blockchain for transactions, addresses, and other interesting information. In this case, well use EtherScan , one of the most popular Ethereum block explorers out there today. Lets take a look at a random Ether transaction via EtherScan. Now lets break down the data that are displayed: TxHash Also known as the transaction ID, TxHash is a way to look up a specific transaction on the Ethereum blockchain. Block Height The block number in which the transaction was included (for an in-depth explanation of blocks, watch this video ) Time Stamp The time the transaction entered the blockchain (i.e., the time the block was mined) From/To The sending and receiving Ethereum addresses Value How much Ether was sent and the equivalentUSD value Before we move to the rest of the terms, lets look at a short explanation of gas. Gas in Ethereum is somewhat similar to transaction fees in Bitcoin . Each operation on the Ethereum network requires a fixed amount of gas (adding two numbers costs 3 gas, calculating a hash costs 30 gas, and sending a transaction costs 21,000 gas, for example). Gas is paid in Ether, but you cant own gas. Its just calculated at a fixed gas/ether exchange rate when you send a transaction on the Ethereum blockchain. Well talk more about gas in a dif Continue reading >>

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